menstrual period days
Euphemistic wasei-eigo from English 'blue day', referring to the days of menstruation. Often used in feminine product contexts or casual conversation.
wasei-eigo (Japanese-coined English), from blue day
I often feel unwell during my period.
I go to buy sanitary pads for my period.
Variant with interpunct; less common.
Wasei-eigo from English 'blue day', combining 'blue' (melancholy) and 'day'. The exact origin is uncertain, but it likely arose as a euphemism for menstruation.